Where does “ὀκτᾰ-” come from?

ὀκτᾰ- (Ancient Greek) comes from Ancient Greek ὀκτώ — eight.

ὀκτᾰ- (Ancient Greek): eight

Definitions

Step	Language	Word	Meaning
1	Ancient Greek	ὀκτώ	eight

ὀκτᾰ- — Etymology, Origin & Word History | Etymology Explorer